West Fargo/Fargo Wastewater Connection Project

Background

The City of West Fargo wastewater system currently consists of a series of ten lagoon cells covering 600 acres of land with 460 acres of actual treatment area (440 million gallons allowable storage volume). The lagoons are near hydraulic capacity and current organic loading grossly exceeds the capacity of the primary cells (pond #1 and #3). The deficiency in treating organic material magnifies operational issues such as odor, in which the city has seen an increase in complaints in recent years as the community has grown. The City of West Fargo decided to address current and future capacity demands by coordinating an agreement with the City of Fargo. This agreement states that West Fargo can send 100% of their wastewater flow to Fargo providing the ability to decommission the existing lagoon system.

Based on the agreement, West Fargo is responsible to install a conveyance system that will deliver its wastewater to a connection point at 19th Avenue N. and Ninth Street NE. Fargo will be installing the necessary collection and metering system to this location with a design capacity to accommodate West Fargo’s future demands, which are 6.5 million gallons per day (average) and 14 million gallons per day (peak).

Proposed Project

The City of West Fargo needs to convey the flows from the Northside Regional Lift (SA40) to the connection point which is nearly 3 miles away (approximately 1 mile north and 2 miles east). The proposed project may consist of a combination of force main and gravity pipe. The City has requested that the following information be investigated as part of this report:

Evaluate multiple pipeline routes

Redundancy in system for force mains

Upgrade existing SA40 or replace lift station

Accommodate future growth

Provide a comparison matrix for alternatives

Estimated Construction Cost

$5.5 million

Estimated Special Assessments

None

Project Schedule

Start Date: July 2018

End Date: October 2019

Project Completion: 90%

Completed Work

Directional boring

Current Work

Forcemain installation

Casing

Pressure testing

Levee bore/casing

Seeding

Upcoming Work

Clean up

Final stabilization

Final details

Lagoon decommissioning

Lagoon Decommissioning

Following the connection to Fargo, the City of West Fargo will decommission the lagoons over time, which will reduce sewage odors.